An error of building mcron from git

[Wensheng Xie]

Hi, mcron:

I cloned mcron from

git clone <membername>@git.savannah.gnu.org:/srv/git/mcron.git

The building process stopped with an error:

```

wxie@debian:~/work/mcron$ ./bootstrap
+ exec autoreconf -vfi
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
autoreconf: configure.ac: not using Autoheader
autoreconf: running: automake --add-missing --copy --force-missing
configure.ac:34: installing 'build-aux/config.guess'
configure.ac:34: installing 'build-aux/config.sub'
configure.ac:29: installing 'build-aux/install-sh'
configure.ac:29: installing 'build-aux/missing'
Makefile.am: installing './INSTALL'
Makefile.am:193: installing 'build-aux/mdate-sh'
Makefile.am:193: installing 'build-aux/texinfo.tex'
parallel-tests: installing 'build-aux/test-driver'
autoreconf: Leaving directory `.'
wxie@debian:~/work/mcron$ ls
aclocal.m4  autom4te.cache  build-aux  ChangeLog.old  configure.ac  doc      INSTALL   Makefile.am  NEWS    src    TODO
AUTHORS     bootstrap       ChangeLog  configure      COPYING       HACKING  maint.mk  Makefile.in  README  tests
wxie@debian:~/work/mcron$ ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
./configure: line 2491: syntax error near unexpected token `3.0'
./configure: line 2491: `GUILE_PKG(3.0 2.2 2.0)'
wxie@debian:~/work/mcron$ echo $GUILE_PKG

```

Where is the GUILE_PKG defined?

There is only one occurrence for it: GUILE_PKG(3.0 2.2 2.0)

best regards,

wxie